Year	Percent
2001	1.24
2002	1.33
2003	1.16
2004	1.33
2005	0.89
2006	1.14
2007	1.11
2008	0.9
2009	0.89
2010	0.9
2011	0.83
2012	0.39
2013	0.41
2015	0.12